{
  "$schema": "https://hyperframes.heygen.com/schema/registry-item.json",
  "name": "rack-focus",
  "type": "hyperframes:block",
  "title": "Rack Focus",
  "description": "A focus pull with real aperture bokeh: the focal plane travels from a near subject to a far one, so one resolves as the other blows into hard-edged polygon discs that clip to a cat's eye toward the corners. A focus pull only reads against content at two clearly separated depths, so this block carries its own depth-layered night exterior and puts both subject depths on variables.",
  "stability": "experimental",
  "dimensions": {
    "width": 1920,
    "height": 1080
  },
  "duration": 6,
  "tags": ["webgl", "shader", "camera", "depth", "cinematic", "showcase"],
  "variables": [
    {
      "id": "nearfocus",
      "type": "number",
      "label": "Near focal distance",
      "default": 1.2,
      "min": 0.2,
      "max": 100,
      "step": 0.05,
      "unit": "m"
    },
    {
      "id": "farfocus",
      "type": "number",
      "label": "Far focal distance",
      "default": 80,
      "min": 0.3,
      "max": 400,
      "step": 0.5,
      "unit": "m"
    },
    {
      "id": "focallength",
      "type": "number",
      "label": "Focal length",
      "default": 85,
      "min": 12,
      "max": 300,
      "step": 1,
      "unit": "mm"
    },
    {
      "id": "aperture",
      "type": "number",
      "label": "Aperture (f-number)",
      "default": 1.8,
      "min": 0.95,
      "max": 22,
      "step": 0.05
    },
    {
      "id": "blades",
      "type": "number",
      "label": "Aperture blades (bokeh shape)",
      "default": 6,
      "min": 3,
      "max": 14,
      "step": 1
    },
    {
      "id": "catseye",
      "type": "number",
      "label": "Cat eye clipping at the corners",
      "default": 0.62,
      "min": 0,
      "max": 1,
      "step": 0.02
    },
    {
      "id": "pullstart",
      "type": "number",
      "label": "Pull start",
      "default": 1.2,
      "min": 0,
      "max": 30,
      "step": 0.05,
      "unit": "s"
    },
    {
      "id": "pullduration",
      "type": "number",
      "label": "Pull duration",
      "default": 3.2,
      "min": 0.1,
      "max": 30,
      "step": 0.05,
      "unit": "s"
    },
    {
      "id": "pullease",
      "type": "string",
      "label": "Pull easing (GSAP ease)",
      "default": "power2.inOut",
      "placeholder": "power2.inOut"
    },
    {
      "id": "bokeh",
      "type": "number",
      "label": "Bokeh exposure",
      "default": 1,
      "min": 0,
      "max": 3,
      "step": 0.05
    },
    {
      "id": "backdrop",
      "type": "color",
      "label": "Backdrop",
      "default": "#05060a"
    }
  ],
  "files": [
    {
      "path": "rack-focus.html",
      "target": "compositions/rack-focus.html",
      "type": "hyperframes:composition"
    }
  ],
  "params": [
    {
      "key": "--nearfocus",
      "label": "Near focal distance in metres (where the pull starts and the near subject sits)",
      "type": "number",
      "default": "1.2",
      "min": 0.2,
      "max": 100,
      "step": 0.05
    },
    {
      "key": "--farfocus",
      "label": "Far focal distance in metres (where the pull ends and the far subject sits)",
      "type": "number",
      "default": "80",
      "min": 0.3,
      "max": 400,
      "step": 0.5
    },
    {
      "key": "--focallength",
      "label": "Focal length in mm (longer lens = shallower depth of field)",
      "type": "number",
      "default": "85",
      "min": 12,
      "max": 300,
      "step": 1
    },
    {
      "key": "--aperture",
      "label": "Aperture f-number (lower = bigger bokeh)",
      "type": "number",
      "default": "1.8",
      "min": 0.95,
      "max": 22,
      "step": 0.05
    },
    {
      "key": "--blades",
      "label": "Aperture blade count, the bokeh polygon's sides",
      "type": "number",
      "default": "6",
      "min": 3,
      "max": 14,
      "step": 1
    },
    {
      "key": "--catseye",
      "label": "Cat's-eye clipping at the frame corners (mechanical vignetting)",
      "type": "number",
      "default": "0.62",
      "min": 0,
      "max": 1,
      "step": 0.02
    },
    {
      "key": "--pullstart",
      "label": "Seconds held on the near subject before the pull starts",
      "type": "number",
      "default": "1.2",
      "min": 0,
      "max": 30,
      "step": 0.05
    },
    {
      "key": "--pullduration",
      "label": "Pull duration in seconds",
      "type": "number",
      "default": "3.2",
      "min": 0.1,
      "max": 30,
      "step": 0.05
    },
    {
      "key": "--pullease",
      "label": "Pull easing (any GSAP ease name)",
      "type": "text",
      "default": "power2.inOut"
    },
    {
      "key": "--bokeh",
      "label": "Bokeh exposure",
      "type": "number",
      "default": "1",
      "min": 0,
      "max": 3,
      "step": 0.05
    },
    {
      "key": "--backdrop",
      "label": "Backdrop",
      "type": "color",
      "default": "#05060a"
    }
  ]
}